Argument: Filibuster undermines democratic principle of majority rule
Jean Edward Smith. "Filibusters: The Senate’s Self-Inflicted Wound." New York Times. March 1, 2009: "The routine use of the filibuster as a matter of everyday politics has transformed the Senate’s legislative process from majority rule into minority tyranny. Leaving party affiliation aside, it is now possible for the senators representing the 34 million people who live in the 21 least populous states — a little more than 11 percent of the nation’s population — to nullify the wishes of the representatives of the remaining 88 percent of Americans."